JP5528891B2 - Stir processing device - Google Patents

Description

  The present invention relates to an agitation processing apparatus that performs processing such as mixing, granulation, or coating of powder particles in the field of manufacturing pharmaceuticals, chemicals, foods, agricultural chemicals, feeds, cosmetics, fine chemicals, and the like.

  In this type of stirring apparatus, a stirring blade for stirring and mixing an object to be processed (powder particles) is usually disposed at the bottom of the processing container, and a crushing blade called a cross screw (or chopper) is disposed on the processing container. It is arranged and arranged on the side (for example, Patent Documents 1 and 2 below).

  The stirring blade is located at the center of the bottom of the processing vessel and is composed of a boss portion connected to the rotation drive shaft and a plurality of blade portions connected to the outer periphery of the boss portion. Each blade portion connected to the boss portion rotates while maintaining a slight clearance between the bottom inner surface and the side inner surface of the processing container, thereby mixing and stirring the object to be processed. In order to control the temperature of the processing container, the outer surface of the processing container is covered with a jacket, and the temperature-controlled water is circulated in a space (jacket portion) formed between the outer surface of the processing container and the inner surface of the jacket. There is also a case.

  Furthermore, in the following Patent Document 3, in the stirring processing apparatus used for chocolate coating and molding, in addition to the jacket portion of the processing container, warm water is circulated inside the blade portion of the stirring blade, The chocolate is prevented from adhering to the outer surface of the wing portion.

JP-A-5-236 JP 2007-307447 A JP 2007-300861 A

  During processing of the workpiece, the outer peripheral side of the blade portion of the stirring blade is always in contact with the workpiece, and the shearing action and centrifugal force are strongly applied to the workpiece, so that the workpiece does not adhere easily. However, the boss part at the center of rotation and the root part of the blade part in the vicinity thereof have a weak shearing action and centrifugal force, and once the object to be treated adheres, the state is maintained and the product cannot be discharged. Therefore, there is a problem that the yield of the product is lowered.

  The subject of this invention is suppressing or preventing adhesion of the to-be-processed object to the stirring blade, especially the boss | hub part of a stirring blade, and the root part of a blade part.

In order to solve the above-described problems, the present invention provides a stirring treatment apparatus including a processing container in which an object to be processed is stored and a stirring blade rotatably disposed at the bottom of the processing container. A boss connected to the drive shaft, a plurality of blades connected to the outer periphery of the boss, and a flow passage for circulating a temperature-adjusted fluid inside the stirring blade. A forward path and a return path which are provided inside and reciprocately flow the fluid along the longitudinal direction of the blade part; an outward path side chamber which is provided inside the outer periphery of the boss part and communicates with the forward path of the blade part via a communication hole; possess a backward side chamber which communicates via a return path and the communication hole of the blade portion, the forward side chamber and the backward-side chamber is provided respectively for each blade unit, and, in the circumferential direction of the boss portion An alternating arrangement is provided. Here, the fluid is a liquid such as water or a gas such as air.

  Further, one of the predetermined forward-side chamber and the return-side chamber adjacent in the circumferential direction communicates with the fluid inflow hole, the other communicates with the fluid discharge hole, and the other forward-side chamber and the return-side chamber The chamber may be communicated with each other in the circumferential direction.

  According to the present invention, the temperature-adjusted fluid is circulated through the forward path and the return path provided inside the blade portion of the stirring blade and the chamber provided inside the outer periphery of the boss portion. Since the shearing action and centrifugal force are weak, it is possible to effectively prevent or suppress the adherence of the object to be processed to the base portion of the boss part and the blade part where the object to be treated is likely to adhere.

1 is a partial cross-sectional view conceptually showing the overall configuration of an agitation treatment apparatus according to an embodiment. It is a partial top view which shows a stirring blade. It is sectional drawing which shows the cross section of a blade | wing part. They are a side view {FIG. 4 (a)} and a cross-sectional view {FIG. 4 (b)} of the boss part. It is a top view {Drawing 4 (a)} of a base, and sectional views {Drawing 4 (b), (c)}. It is a figure which shows the distribution | circulation aspect of the temperature control water in a stirring blade.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 conceptually shows the overall configuration of the agitation processing apparatus 1 according to this embodiment.

  The processing container 2 is composed of a bottom portion 2a and a side portion 2b. The lower portion of the side portion 2b is formed in a cylindrical shape, and the upper portion is formed in a conical cylinder shape whose diameter is gradually reduced upward. The outer surface side of the processing container 2 is covered with a jacket, and a temperature-adjusted fluid (fluid or gas) such as water (warming water or cooling water) is formed in a space formed between the inner surface of the jacket and the outer surface of the processing container. You may make it distribute | circulate and control the temperature of the processing container 2. FIG.

  The side 2b of the processing container 2 has an upper end opened, and a lid member is attached to the upper end opening so as to be opened and closed by an appropriate opening / closing mechanism (not shown). Also, the lid member has an insertion port for liquid supply means for supplying a binder liquid, a film agent liquid, etc., an exhaust part for exhausting the air in the processing container 2, a hot air supply port and an inspection window, if necessary In addition, an insertion port for the cleaning liquid supply means is installed. Furthermore, a crushing blade called a cross screw (or chopper) is disposed on the side portion 2b so as to be rotatable about a horizontal axis (not shown) as required.

  On the bottom 2a of the processing vessel 2, a stirring blade 3 is rotatably disposed. The stirring blade 3 has a plurality (three in this embodiment) of blade portions 4 that rotate while maintaining a slight clearance between the inner surface of the bottom portion 2a and the inner surface of the side portion 2b, and the plurality of blade portions 4 are radial. And a boss portion 5 connected to the. The rotary drive shaft 6 of the stirring blade 3 is connected to the boss portion 5 and passes through an annular bush 7 fixed to the central portion of the bottom portion 2a downward in the vertical direction and is connected to the speed reducer 8. The reduction gear 8 receives rotational power from a motor (not shown).

  As shown in FIG. 2, each blade portion 4 is composed of a base portion 4a extending in the radial direction from the outer periphery of the boss portion 5, and a tip portion 4b bent at a predetermined angle forward from the base portion 4a in the rotational direction. The base portion 4a and the tip portion 4b are inclined at a predetermined angle so as to have a downward gradient forward in the rotational direction.

  As shown in FIG. 3, each blade | wing part 4 is formed in hollow shape, The inside is divided into space part 4c, 4d along a longitudinal direction. The space portion 4c and the space portion 4d communicate with each other at the outer diameter end portion of the blade portion 4, and also communicate with communicating holes 5b1 and 5b2 of the boss portion 5 described later.

  As shown in FIG. 4, the boss portion 5 has a substantially frustoconical appearance, and includes a base portion 5 a on the center side and a cover portion 5 b that covers the base portion 5 a from the outer peripheral side.

  The base portion 5 a includes a shaft hole portion 5 a 1 into which the upper end portion of the rotary drive shaft 6 is fitted, and a fitting portion 5 a 2 to be fitted into the annular bush 7. Circumferential grooves 5a3, 5a4 are formed in the shaft hole 5a1 so as to be spaced apart in the vertical direction, and the circumferential grooves 5a3, 5a4 communicate with the radial through holes 5a5, 5a6, respectively. In this embodiment, the through holes 5a5 and 5a6 are provided at three locations that are close to each other in the circumferential direction (see FIG. 5). The cover portion 5 b has a communication hole 5 b 1 that communicates with the space portion 4 c of the blade portion 4 and a communication hole 5 b 2 that communicates with the space portion 4 d of the blade portion 4. The communication hole 5b1 and the communication hole 5b2 are provided for each blade portion 4, respectively.

  As shown in FIG. 5, a plurality of partition walls D are provided on the outer periphery of the base portion 5a so as to protrude by a predetermined dimension on the outer diameter side. The partition wall D is composed of a plurality of first partition walls D1 having relatively large vertical heights and a plurality of second partition walls D2 having relatively small vertical heights. D1 and the second partition wall D2 are arranged in the circumferential direction at a predetermined interval. The outer peripheries of the first partition wall D1 and the second partition wall D2 have shapes and dimensions that match the inner periphery of the cover part 5b. When the cover part 5b is fixed to the base part 5a by appropriate means such as welding, the cover part 5b A plurality of space portions C1 to C6 partitioned by the first partition wall D1 and the second partition wall D2 are formed between the inner periphery of the base portion 5a and the outer periphery of the base portion 5a. The space portions C1 and C2, C3 and C4, C5 and C6, and C6 and C1 that are adjacent in the circumferential direction through the first partition wall D1 having a large height are separated from each other by the first partition wall D1. The space portions C2 and C3 and C4 and C5 that are adjacent in the circumferential direction via the small second partition wall D2 communicate with each other via the communication space above the top of the second partition wall D2. Further, a through hole 5a5 is opened in the space C1, and a through hole 5a6 is opened in the space C6. Further, in this embodiment, a third partition wall D3 having the same shape and height as the second partition wall D2 and having a width smaller than that of the second partition wall D2 is provided near the first partition wall D1, and the space C1, It is located in C3 and C5. The third partition wall D3 may be omitted. Hereinafter, the spaces C1 to C6 are referred to as “chambers C1 to C6”, the through holes 5a5 are referred to as “inflow holes 5a5”, and the through holes 5a6 are referred to as “discharge holes 5a6”.

  As shown in FIG. 1, in the processing container 2, a bush 7 is fixed to a mounting hole provided at the center of the bottom 2 a, and the upper part of the rotary drive shaft 6 is rotatably inserted into the inner periphery of the bush 7. Then, the bearing hole 5a1 (see FIG. 4) of the base portion 5a of the boss portion 5 is externally fitted to the upper end portion of the rotational drive shaft 6, and the fitting portion 5a2 of the base portion 5a is fitted to the bush 7 and then rotationally driven. A lock nut is fastened to a male screw provided at the upper end of the shaft 6, and the boss portion 5 is connected to the rotary drive shaft 6. Thereby, the stirring blade 3 is rotatably installed on the bottom 2a of the processing container 2.

  A fluid (liquid or gas) whose temperature has been adjusted to a predetermined temperature, and water whose temperature has been adjusted to a predetermined temperature (hereinafter referred to as “temperature-controlled water”) are supplied into the rotary drive shaft 6. An inflow passage 6a and a discharge passage 6b through which temperature-controlled water is discharged are provided, and an upper end opening of the inflow passage 6a communicates with a circumferential groove 5a3 (see FIG. 4) on the lower side of the base portion 5a and is discharged. The upper end opening of the passage 6b communicates with the circumferential groove 5a4 on the upper side of the base portion 5a.

  When temperature adjustment water (heating water or cooling water) is supplied to the inflow passage 6a of the rotary drive shaft 6, the temperature adjustment water flows through the inflow passage 6a and flows into the circumferential groove 5a3 of the base portion 5a of the boss portion 5. Then, it flows into the chamber C1 from the circumferential groove 5a3 through the inflow hole 5a5. As shown in FIG. 6, since the chamber C1 is partitioned on both sides in the circumferential direction by the first partition wall D1, the temperature-controlled water that has flowed into the chamber C1 passes through the communication hole 5b1 of the cover portion 5b to the space of the blade portion 4. It flows into the portion 4c (hereinafter, the space portion 4c is referred to as “outward path 4c”), circulates through the forward path 4c and the space portion 4d connected thereto (hereinafter, the space portion 4c is referred to as “return path 4d”), and covers. It flows into the chamber C2 that is adjacent to the chamber C1 in the circumferential direction from the communication hole 5b2 of the portion 5b. The temperature-controlled water flowing into the chamber C2 flows into the adjacent chamber C3 via the communication space above the top of the second partition wall D2, and circulates in the forward path 4c and the return path 4d of the blade section 4 in the same manner as described above. Into the adjacent chamber C4. The temperature-controlled water flowing into the chamber C4 flows into the adjacent chamber C5 through the communication space above the top of the second partition wall D2, and circulates in the forward path 4c and the return path 4d of the blade section 4 in the same manner as described above. Into the adjacent chamber C6. The temperature-controlled water that has flowed into the chamber C6 enters the circumferential groove 5a4 of the base portion 5a from the chamber C6 through the discharge hole 5a6, and flows out from the circumferential groove 5a4 to the outside through the discharge passage 6b of the rotary drive shaft 6. To do.

  As described above, the agitation processing apparatus of this embodiment adjusts the temperature in the forward path 4c and the return path 4d provided in each blade part 4 of the stirring blade 3 and the chambers C1 to C6 provided in the outer periphery of the boss part 5. Since water is circulated, the treatment object adheres to the outer surface of the stirring blade 3, particularly the shearing action and centrifugal force are weak, and the boss part 5 and the blade part 4 are prone to adhere to the treatment object. Is prevented or suppressed.

2 Processing Vessel 2a Bottom 3 Agitation Blade 4 Blade 4c Outward 4d Return 5 Boss C1 to C6 Chamber 5b1 Communication Hole 5b2 Communication Hole 5a5 Inflow Hole 5a6 Discharge Hole

Claims (2)

In an agitation processing apparatus provided with a processing container in which an object to be processed is accommodated and an agitation blade rotatably disposed at the bottom of the processing container,
The stirring blade includes a boss portion connected to a rotation drive shaft, a plurality of blade portions connected to the outer periphery of the boss portion, and a flow passage for circulating a temperature-controlled fluid inside the stirring blade. ,
The flow path is provided inside the blade part, and is provided in an outward path and a return path for reciprocating the fluid along the longitudinal direction of the blade part, and provided in an outer periphery of the boss part, and the forward path of the blade part. possess a forward side chamber to communicate with each other through the communication hole, and a return-side chamber which communicates via a return path and the communication hole of the blade portion,
The agitation processing apparatus, wherein the forward path side chamber and the return path side chamber are provided for each of the blade portions, and are alternately arranged in a circumferential direction of the boss portion . Of the predetermined forward path chamber and the return path chamber adjacent in the circumferential direction, one communicates with the fluid inflow hole, the other communicates with the fluid discharge hole, and the other forward path chamber and the other The agitation processing apparatus according to claim 1 , wherein the return path chamber communicates with each other in a circumferential direction.

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